/*
 * Copyright (c) 2011 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.api.client.generator.common.java;

import com.google.common.collect.ImmutableSet;

import javax.annotation.Nullable;

/**
 * Common Java utilities.
 *
 * @author Yaniv Inbar
 */
public class JavaUtil {

  /** Reserved Java identifiers. */
  private static final ImmutableSet<String> RESERVED_JAVA_IDENTIFIERS = ImmutableSet.of(
  // keywords
  "abstract",
      "assert",
      "boolean",
      "break",
      "byte",
      "case",
      "catch",
      "char",
      "class",
      "const",
      "continue",
      "default",
      "do",
      "double",
      "else",
      "enum",
      "extends",
      "final",
      "finally",
      "float",
      "for",
      "goto",
      "if",
      "implements",
      "import",
      "instanceof",
      "int",
      "interface",
      "long",
      "native",
      "new",
      "package",
      "private",
      "protected",
      "public",
      "return",
      "short",
      "static",
      "strictfp",
      "super",
      "switch",
      "synchronized",
      "this",
      "throw",
      "throws",
      "transient",
      "try",
      "void",
      "volatile",
      "while",
      // unused, but reserved keywords
      "const",
      "goto",
      // special literals
      "true",
      "false",
      "null");

  /** Returns whether the given identifier is a reserved Java identifier. */
  public static boolean isReserved(@Nullable String identifier) {
    return RESERVED_JAVA_IDENTIFIERS.contains(identifier);
  }

  private JavaUtil() {
  }
}
